US3536639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing vapor permeable polyurethane fibers
Assignee: Carl Freudenberg KG
•
Filing: 1966-04-21
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Granted: 1970-10-27
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Expires: 1986-04-21
Abstract
No abstract record available.
Inventors
- 👤 Theodor Schachowskoy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:03
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/28; B; B29; B29C; B29C67/00; B29C67/20; B29C67/202; D; D06; D06N; D06N3/00; D06N3/12; D06N3/14; B29K; B29K2075/00; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA639553A
Cited
US2884336A
Cited
US3100721A
Cited
FR1296758A
Cited
US3190765A
Cited
US3388100A
Cited
US3348963A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-26 | 1974-04-27 | 1974-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-26 | 1978-04-27 | 1978-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-26 | 1982-04-27 | 1982-10-27 | $7700.00 | Window Closed / Lapsed |